1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c219f1b79e9c628807717226da5b0badcca6c273044f355a306c9e10c14dd1. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaa418d3-23bb-475f-a2a2-92f413e4d742.json and https://artists.proofprofile.net/proofs/artist/aaa418d3-23bb-475f-a2a2-92f413e4d742.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b959ee8536bf5280c8290af8c5e0df0e724bbcaecde1c3819d2d3425722db97. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2115315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0c3ce368b34110799905f6f183a758c82bdc3d5e12550d9f710b477efe8806. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fa7e4e4c06e68cf074b678a60d8fadf1f75a4ef4f2e1c3b2f0abab68b90945. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a95bb40db4a0f2ec50a862861d237cded9e95560b72b9be1350772955145013. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a85b2cd4c9b937cde94d3c8f452ccf86990e9de691d9d2fd2729d1cb39b6df. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aa48e5692b320c00f75f8b6e21ef5408c410a6cb299a6aa8fcc288f50b198f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c40dc39141926e6762aef10c7af55f1bf011e506dff7faddbdd256b6810b2e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe063180493ac76a63675f54699e59f4311551ab06661713ad90a0f5b1251d9d7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ff5f20ad9b5bc84a3ba141d499c522b208cfb3aa45f2f0a335937def2e621c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c879e3734dbdeb2879291bd6d88b978806587cfc44a2ec36e86f41acb4b2589. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2314bfd6fa450a77eb74cb18328326b15e876238662a57d6802f057b677a3c7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2133502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed67b75323943516bc02fbe59df602fd14216c2e1005296a43d885f6a4139f5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffedd355cba944ecb302afc27f2dc1b1aff81a8722b6431f4400eb15ecef975. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba5d5961f2fea92828aa3c83900aa353c2034a75627a35b8937a4b0fd6b1a7a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba827ff64e16e55bd09842ccaf4fa0b8d451e80bdae102b78f4bd9dc95a65f9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5292468553851bda4036eab2c6b498bc257a5cb51a5159525eeba7e7d305373c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3e57557560d618fa18c625b4990acc40c47ef7cf5ec00caa4329b7ea7806e9. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa632e7947f04f2ed89f2336831288d505ddba24c51bc0409308b917719a3b8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f1abb42712d5cdd2821491ce8eb89ac6dc7294aa2f6ccb5b9c7f8edf32997e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f9aeb2d2da69a46c46577e1e48c1d697c0652fbc711dd5404e2edab1e5af49. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8cd3165788ae45f49794f3be6f76353a75f3103fb40d68357f832a42102a70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJ3V2387349.